I have had recent issues with my charging system, so I installed a new voltage regulator, alternator (refurb) and battery. My car now starts, but the red "GEN" light is always on. Any ideas? Also, does the voltage regulator need grounded? My old one was not when I took it off, but I noticed there is a metal tab that I would think needed something attached to it, so I attached a black ground wire. If that is wrong, is that what could be setting the red light to go off? Any advice appreciated... Thanks!